LinkedIn and Plaxo

I like using LinkedIn and Plaxo. It is very useful especially if you have to communicate with a large group, like this class (Kin 710). I like that I can add all my information and contacts in one site. All my contacts just showed up from different sites and then I clicked upload.  Also, I liked that Plaxo connected all of my contacts on facebook.  Both of these sites make social networking much more efficient.